Adrian Smith is a mathematician with particular expertise in the field of Bayesian statistics. This widely applicable branch of mathematics represents uncertainties in the form of probabilities, which are then modified through the mechanism of Bayes theorem as new information becomes available. Adrian’s comprehensive monographs on diverse areas of Bayesian statistics have had a major impact on statistical practice in a wide range of disciplines and application areas. He has been awarded the Royal Statistical Society’s Guy Medals in Bronze, Silver and Gold and served from 1995 to 1997 as its President. In the 2011 New Year Honours list, he was awarded the title of Knight Bachelor. Sir Adrian is currently President Elect of the Royal Society and will take up office on 30 November 2020.